I hope this is okay for you, this is my first time doing this! 

Professors in a T.V Show, good or bad?

While appearing in a TV show seems like something good, the truth is that it has more disadvantages than benefits. For instance, when a professor appears in a program, he does not look like someone serious, other professors would doubt ("might" might be a better word here than doubt, however it is still correct) about his knowledge. Therefore his reputation would be hurt damaged and no one would believe on his word.

Secondly, he will  would have to spent time to prepare whatever he is going to present. Furthermore, he will would have to try to look good for the TV and will would have to travel to the location. (or...as well as travelling to the location.) The time that he is going to spent d in this activities doing this could be the time that he could give to his students. Moreover, the audience would not get have interest in the quality of his lecture, the audience as they prefers entertainment rather than education.

To conclude, no one want to hear serious lectures while they are relaxing or resting in the evening. The audience probably will will probably feel happy, despite the content of the TV show is bad if the see the title of the professor who is presenting the idea.  (What do you mean here?)